Pishkun Dike 1 Reservoir Report
Nearby: Pishkun Dike 2 Pishkun Dike 8
Last Updated: December 5, 2025
Pishkun Dike 1, located in Choteau, Montana, is a federal-owned earth dam designed by the Bureau of Reclamation for irrigation purposes.
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Summary
Completed in 1930, this impressive structure stands at a height of 50 feet with a hydraulic height of 37 feet, spanning a length of 2480 feet. With a normal storage capacity of 46,670 acre-feet and a surface area of 1550 acres, Pishkun Dike 1 plays a crucial role in water resource management in the region.
Surrounded by the scenic landscape of Teton County, Montana, Pishkun Dike 1 serves as a vital component in the Deep Creek TR watershed, providing essential water for agricultural activities. Despite being classified as having a high hazard potential, the dam is regulated and inspected by the Bureau of Reclamation to ensure its structural integrity and safety. With no spillway and a risk assessment rating of 2 (high), Pishkun Dike 1 continues to be a significant water management asset in the region, supporting the local community's irrigation needs.
As one of seven associated structures under the NIDID MT00575, Pishkun Dike 1 stands as a testament to the engineering excellence of its designers and the commitment of federal agencies to maintain and regulate critical water infrastructure. With its historical significance and ongoing role in water resource management, this earth dam represents a key feature in the landscape of Montana, contributing to the sustainable utilization of water resources in the area.
Year Completed |
1930 |
Dam Length |
2480 |
Dam Height |
50 |
River Or Stream |
DEEP CREEK TR |
Primary Dam Type |
Earth |
Surface Area |
1550 |
Hydraulic Height |
37 |
Drainage Area |
6208 |
Nid Storage |
46670 |
Structural Height |
50 |
Hazard Potential |
High |
Foundations |
Rock |
Nid Height |
50 |
Seasonal Comparison
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Dam Data Reference
Condition Assessment
SatisfactoryNo existing or potential dam safety deficiencies are recognized. Acceptable performance is expected under all loading conditions (static, hydrologic, seismic) in accordance with the minimum applicable state or federal regulatory criteria or tolerable risk guidelines.
Fair
No existing dam safety deficiencies are recognized for normal operating conditions. Rare or extreme hydrologic and/or seismic events may result in a dam safety deficiency. Risk may be in the range to take further action. Note: Rare or extreme event is defined by the regulatory agency based on their minimum
Poor A dam safety deficiency is recognized for normal operating conditions which may realistically occur. Remedial action is necessary. POOR may also be used when uncertainties exist as to critical analysis parameters which identify a potential dam safety deficiency. Investigations and studies are necessary.
Unsatisfactory
A dam safety deficiency is recognized that requires immediate or emergency remedial action for problem resolution.
Not Rated
The dam has not been inspected, is not under state or federal jurisdiction, or has been inspected but, for whatever reason, has not been rated.
Not Available
Dams for which the condition assessment is restricted to approved government users.
Hazard Potential Classification
HighDams assigned the high hazard potential classification are those where failure or mis-operation will probably cause loss of human life.
Significant
Dams assigned the significant hazard potential classification are those dams where failure or mis-operation results in no probable loss of human life but can cause economic loss, environment damage, disruption of lifeline facilities, or impact other concerns. Significant hazard potential classification dams are often located in predominantly rural or agricultural areas but could be in areas with population and significant infrastructure.
Low
Dams assigned the low hazard potential classification are those where failure or mis-operation results in no probable loss of human life and low economic and/or environmental losses. Losses are principally limited to the owner's property.
Undetermined
Dams for which a downstream hazard potential has not been designated or is not provided.
Not Available
Dams for which the downstream hazard potential is restricted to approved government users.
Pishkun Dike 1